Jet cleaning device for machine tools

Abstract

A machine tool jet cleaning device, comprising a tool holder, a connecting seat, a shell and an air inlet channel through which air flows into the shell, both ends of the tool holder are respectively provided with a spindle connecting part and a vane connecting shaft, the spindle connecting part is used for connecting to the spindle of the machine tool, the connecting seat is provided with a avoiding hole, the connecting seat is sleeved on the tool holder through the avoiding hole of the vane connecting shaft, and the connecting seat and the tool holder are connected through a bearing; the shell penetrates through both ends, one end is connected to the bottom of the connecting seat, the other end is provided with an air outlet, the vane connecting shaft is connected with a vane, and the vane is located in the shell. Compared with the prior art, the machine tool jet cleaning device has the advantages of simple structure, good cleaning effect, prevention of damage of the vane caused by cuttings and the like, improvement of the service life of the vane and dynamic balance and stability during rotation of the spindle.

Description

Technical Field

[0001] This invention belongs to the field of cleaning device technology, and specifically relates to a machine tool air jet cleaning device. Background Technology

[0002] Currently, existing machine tools use air compressors to generate compressed air, which removes chips, oil stains, or dust from workpieces, keeping them clean. However, for some machine tools that don't require an air compressor for other functions (such as providing power to cylinders or pneumatic clamps), including an air compressor solely for cleaning complicates the machine's structure and increases costs. Therefore, researching a cleaning device that doesn't rely on an air compressor but provides high-pressure airflow to ensure effective cleaning is crucial for optimizing machine tool structure and reducing costs.

[0003] In the prior art, such as the patent announcement number CN215317996U, a Morse taper tool holder that is easy to operate is disclosed. The tool holder has a mesh cover on its outer shell, and a fan blade is provided inside the mesh cover. The fan blade can rotate with the rotation of the tool holder, thereby generating airflow. However, according to the background art and the description of the beneficial effects, the purpose of setting the fan blade is to solve the problem that "when the existing Morse taper tool holder drives the tool to rotate at high speed for grinding, the temperature of the tool will rise sharply due to the high-speed friction between the tool and the workpiece. In order to ensure the strength of the tool, it is necessary to cool the tool. The traditional method is to spray liquid to cool the tool, which causes the grinding waste to mix with the coolant, increasing the difficulty of cleaning." The main function is to cool the tool. Correspondingly, in order to ensure the cooling effect, more airflow needs to flow from the outside of the mesh cover into the inside of the mesh cover, and the mesh cover needs to be set as a "mesh" structure. During use, chips, dust, and other contaminants can easily enter the fan blades through the guard, damaging them and affecting their lifespan. Furthermore, when used in precision machining tools, the tool holder can also affect the dynamic balance of the spindle, reducing machining accuracy and spindle lifespan. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a machine tool air jet cleaning device.

[0005] To achieve the above objectives, the present invention discloses a machine tool air jet cleaning device, including a tool holder, a connecting seat, a housing, and an air intake channel for airflow into the housing. The tool holder has a spindle connecting part and an impeller connecting shaft at both ends. The spindle connecting part is used to connect to the spindle of the machine tool. The connecting seat has a clearance hole. The connecting seat passes through the clearance hole and is sleeved on the tool holder through the impeller connecting shaft. The connecting seat and the tool holder are connected by a bearing.

[0006] The outer casing extends through both ends, with one end connected to the bottom of the connecting seat and the other end having an air outlet. An impeller is connected to the impeller connecting shaft, and the impeller is located inside the outer casing.

[0007] Preferably, the free end of the impeller connecting shaft is threaded with a locking cone, which is located inside the housing, and the rotation direction of the locking cone when threaded is opposite to the rotation direction of the machine tool spindle.

[0008] More preferably, the impeller connecting shaft is provided with a connecting hole opening towards the locking cone, the axis of the connecting hole is collinear with the axis of the tool holder, the connecting hole includes a threaded hole and a limiting hole arranged from the inside to the outside, the bottom surface of the locking cone is provided with a locking connecting shaft, the connecting shaft includes a threaded shaft threadedly connected to the threaded hole and a limiting shaft radially limited to the limiting hole.

[0009] More preferably, the bottom surface of the locking cone is provided with an annular clearance groove, the free end of the impeller connecting shaft extends into the annular clearance groove, and the distance between its end face and the bottom surface of the annular clearance groove is greater than or equal to 0.

[0010] Preferably, the cross-sectional dimensions of the outer casing gradually decrease in the direction of the air outlet.

[0011] More preferably, there are multiple bladed disks, and the cross-sectional dimensions of the multiple bladed disks gradually decrease in the direction towards the air outlet.

[0012] Preferably, the impeller comprises an integrally formed disc and blades.

[0013] Preferably, the connecting seat is provided with a positioning post that cooperates with the spindle limit of the machine tool.

[0014] Preferably, the connecting seat is provided with an air inlet, which is the air inlet channel.

[0015] More preferably, the air inlet is provided with a mesh screen.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The tool holder is connected to the connecting seat, which in turn connects to a housing. An impeller located inside the housing is connected to the impeller connecting shaft of the tool holder. When cleaning is required, the tool holder is connected to the machine tool spindle. The tool holder and impeller rotate with the spindle. Under the combined action of the impeller and the housing, the kinetic energy of the gas inside the housing increases, and the flow velocity increases, allowing the cleaning device to eject a high-pressure airflow, thus improving the cleaning effect. This cleaning device fully utilizes the rotational properties of the spindle, eliminating the need for a high-pressure airflow generated by a traditional air compressor, simplifying the structure and reducing costs.

[0018] The outer casing not only works with the impeller to eject high-pressure airflow, but also prevents chips and other debris from damaging the impeller, thus extending its service life. At the same time, it improves the dynamic balance and stability of the spindle (especially high-precision machine tool spindles and high-speed spindles) during rotation, preventing uneven stress on the spindle caused by impeller damage, which leads to vibration and poor stability during spindle rotation and ultimately damage to the spindle. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the machine tool air jet cleaning device of the present invention;

[0020] Figure 2 for Figure 1 3D exploded view of the air jet cleaning device for medium-sized machine tools;

[0021] Figure 3 for Figure 1 A three-dimensional structural diagram of the locking cone head;

[0022] Figure 4 for Figure 1 A sectional view of the tool holder;

[0023] Figure 5 for Figure 1 A three-dimensional structural diagram of the inner and outer shell;

[0024] Figure 6 for Figure 1 A three-dimensional structural diagram of the connecting seat;

[0025] Tool holder 1; spindle connecting part 11; impeller connecting shaft 12; connecting hole 121; threaded hole 1211; limiting hole 1212; keyway 122;

[0026] Connector 2; Mounting slot 21; Positioning post 22; Air inlet 23; Limiting shoulder 24;

[0027] Outer shell 3;

[0028] Bearing 4;

[0029] Locking cone 5; locking connecting shaft 51; threaded shaft 52; limiting shaft 53; annular clearance groove 54;

[0030] Blade disc 6; Rotary disc 61; Blade 62;

[0031] Positioning component 7;

[0032] 8 rings;

[0033] Outer ring cover 9;

[0034] Inner ring cover 10. Detailed Implementation

[0035] In the description of this invention, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of the different embodiments or examples, without contradiction.

[0038] The following is in conjunction with the appendix Figure 1-6 The technical solution of the present invention will be further described below.

[0039] A machine tool air jet cleaning device, including (see above) Figures 1-2 The machine tool consists of a tool holder 1, a connecting seat 2, a housing 3, and an air intake channel for airflow into the housing 3. The tool holder 1 has a spindle connecting part 11 and an impeller connecting shaft 12 at both ends. The spindle connecting part 11 connects to the machine tool spindle. The connecting seat 2 has clearance holes, through which it passes the impeller connecting shaft 12 and is fitted onto the tool holder 1. The connecting seat 2 and the tool holder 1 are connected by a bearing 4. The connecting seat 2 is fixed relative to the machine tool spindle, ensuring the stability of the spindle rotation by preventing the connecting seat 2 from rotating as the tool holder 1 rotates with the spindle. The housing 3 extends through both ends, with one end connected to the bottom of the connecting seat 2 and the other end serving as an air outlet. An impeller 6 is connected to the impeller connecting shaft 12, rotating synchronously with the impeller connecting shaft 12 (tool holder 1). The impeller 6 is located inside the housing 3.

[0040] The cleaning device described above connects the tool holder 1 to the connecting seat 2, which in turn connects to a housing 3. An impeller 6, located inside the housing 3, is connected to the impeller connecting shaft 12 of the tool holder 1. When cleaning is required, the tool holder 1 is connected to the machine tool spindle (connecting the tool holder 1 to the spindle allows for existing tool changing operations). The tool holder 1 and the impeller 6 rotate with the spindle. Under the combined action of the impeller 6 and the housing 3, the kinetic energy of the gas inside the housing 3 increases, and the flow velocity increases, enabling the cleaning device to eject a high-pressure airflow, thus improving the cleaning effect. This cleaning device fully utilizes the rotational properties of the spindle, eliminating the need for a high-pressure airflow generated by a traditional air compressor, simplifying the structure and reducing costs. The outer casing 3 not only works with the impeller 6 to eject a high-pressure airflow, but also prevents chips and other materials from damaging the impeller 6, thus extending its service life. At the same time, it can also improve the dynamic balance and stability of the spindle (especially high-precision machine tool spindles and high-speed spindles) during rotation, avoiding uneven stress on the spindle caused by damage to the impeller 6, which can lead to vibration and poor stability during spindle rotation and ultimately damage to the spindle.

[0041] See Figures 2-3 The free end of the impeller connecting shaft 12 is threaded with a locking cone 5. The bottom surface of the locking cone 5 (the surface away from the cone) abuts against the impeller 6. The rotation direction of the locking cone 5 when threaded is opposite to the rotation direction of the machine tool spindle. Thus, when the tool holder 1 rotates with the spindle, the locking cone 5 tends to rotate relative to the impeller connecting shaft 12, further locking the impeller 6. This helps improve the assembly reliability and rotational stability of the impeller 6, preventing the locking cone 5 from loosening and causing vibration during rotation, poor rotational stability, and potential damage to the spindle. The locking cone 5 is located inside the housing 3. When air blows out from the air outlet, the air is guided by the side of the locking cone 5 to the side closer to the axis of the locking cone 5. The blown air has a "concentrating" effect, with greater air pressure, and can concentrate the airflow on a designated area, resulting in better cleaning. The above design can fully lock the impeller 6 using only one locking cone, and at the same time, the side of the locking cone 5 can guide the air to "concentrate" and blow it out, improving the cleaning effect, realizing functional reuse, and having a simple and compact structure, which helps to reduce costs.

[0042] Among them, see Figures 3-4The impeller connecting shaft 12 has a connecting hole 121 opening towards the locking cone 5. The axis of the connecting hole 121 is collinear with the axis of the tool holder 1. The connecting hole 121 includes a threaded hole 1211 and a limiting hole 1212 arranged from the inside to the outside. The bottom surface of the locking cone 5 is provided with a locking connecting shaft 51. The connecting shaft includes a threaded shaft 52 threadedly connected to the threaded hole 1211 and a limiting shaft 53 radially limitingly engaged with the limiting hole 1212. During assembly, the locking cone 5 is connected to the threaded hole 1211 through the threaded shaft 52. Furthermore, the cross-sectional shape and size of the limiting shaft 53 and the limiting hole 1212 are similar. Through the limiting engagement between the limiting shaft 53 and the limiting hole 1212, radial runout during the threaded connection is avoided, improving assembly stability and reliability. This further improves the balance performance during rotation and reduces the impact on the spindle caused by rotational imbalance.

[0043] In this embodiment, see Figure 2 , Figure 4 The impeller connecting shaft 12 is provided with a keyway 122, and the impeller 6 is provided with a positioning groove. After the impeller 6 is fitted onto the impeller connecting shaft 12, it is limited by the positioning element 7, so that the impeller 6 can rotate synchronously with the impeller connecting shaft 12. In the figure, there is only one set of keyway 122 and other corresponding structures. Preferably, there can be two sets, which are symmetrically arranged.

[0044] In this embodiment, there are multiple impellers 6, optionally three. After the three impellers 6 are fitted onto the impeller connecting shaft 12, they are separated from each other by collars 8 to avoid interference.

[0045] After the impeller 6 is fitted onto the impeller connecting shaft 12, a section of the free end of the impeller connecting shaft 12 remains, which makes it inconvenient for the locking cone 5 to lock the impeller 6. Therefore, the bottom surface of the locking cone 5 is provided with an annular clearance groove 54. The free end of the impeller connecting shaft 12 extends into the annular clearance groove 54, and the distance between its end face and the bottom surface of the annular clearance groove 54 is greater than or equal to 0. With this arrangement, the end of the impeller connecting shaft 12 can be concealed within the annular clearance groove 54, and the bottom surface of the locking cone 5 can abut against the impeller 6, ensuring the assembly reliability of the impeller 6. In this embodiment, preferably, the distance between the end face of the free end of the impeller connecting shaft 12 and the bottom surface of the annular clearance groove 54 is greater than zero.

[0046] In this embodiment, as Figures 1-2 , Figure 5 The cross-sectional dimensions of the inner wall of the outer casing 3 gradually shrink in the direction of the air outlet. In this way, the air ejected from the outer casing 3 is guided by the inner wall of the outer casing 3 and blown out towards the side close to the axis of the locking cone head 5. The blown air has a "concentrating" effect, which further improves the air pressure and cleaning effect.

[0047] In this embodiment, the cross-sectional dimensions of the three impellers 6 gradually decrease in the direction towards the air outlet, thereby adapting the cross-sectional dimensions of the impellers 6 and the outer casing 3. Without causing interference between the impellers 6 and the outer casing 3, the air jet effect is maximized, and the cleaning effect is improved.

[0048] In this embodiment, the impeller 6 includes a turntable 61 and blades 62, which are integrally formed structures. The tool holder 1 is also an integrally formed structure. This not only helps to improve its service life, but also improves the balance during rotation. It greatly avoids the problems of vibration and poor rotational balance caused by the split structure, which ultimately affect the spindle life and processing effect.

[0049] In this embodiment, see Figures 1-2 The connecting seat 2 is provided with a positioning pin 22 that cooperates with the spindle limit of the machine tool. This can prevent the connecting seat 2 from rotating with the tool holder 1 and improve the rotational balance of the tool holder 1.

[0050] In this embodiment, see Figures 1-2 , Figure 6 The connecting seat 2 is provided with an air inlet 23, which is an air intake channel. Furthermore, the air inlet 23 is provided with a mesh screen, which can prevent debris from entering the outer casing 3 and avoid affecting the service life of the impeller 6.

[0051] In this embodiment, the connecting seat 2 is provided with a mounting groove 21, and the bottom of the mounting groove 21 is provided with a limiting shoulder. After the bearing 4 is installed on the mounting groove 21, one end of it abuts against the limiting shoulder 24. The connecting seat 2 can also be detachably connected with an outer ring cover 9 and an inner ring cover 10, and the bearing 4 is fixedly installed in the mounting groove 21 by the outer ring cover 9 and the inner ring cover 10. Figure 6 It can be seen that the mounting groove 21 is the aforementioned clearance hole.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A machine tool air jet cleaning device, characterized in that: The tool holder includes a tool holder, a connecting seat, a housing, and an air intake channel for airflow into the housing. The tool holder has a spindle connecting part and an impeller connecting shaft at both ends. The spindle connecting part is used to connect to the spindle of the machine tool. The connecting seat has a clearance hole. The connecting seat passes through the clearance hole and is sleeved on the tool holder through the impeller connecting shaft. The connecting seat and the tool holder are connected by a bearing. The outer casing extends through both ends, with one end connected to the bottom of the connecting seat and the other end having an air outlet. An impeller is connected to the impeller connecting shaft, and the impeller is located inside the outer casing. The free end of the impeller connecting shaft is threaded with a locking cone. The locking cone is located inside the housing, and the rotation direction of the locking cone when threaded is opposite to the rotation direction of the machine tool spindle. The impeller connecting shaft is provided with a connecting hole that opens toward the locking cone. The axis of the connecting hole is collinear with the axis of the tool holder. The connecting hole includes a threaded hole and a limiting hole arranged from the inside to the outside. The bottom surface of the locking cone is provided with a locking connecting shaft. The connecting shaft includes a threaded shaft that is threadedly connected to the threaded hole and a limiting shaft that radially limits the limiting hole. The bottom surface of the locking cone is provided with an annular clearance groove, the free end of the impeller connecting shaft extends into the annular clearance groove, and the distance between its end face and the bottom surface of the annular clearance groove is greater than or equal to 0. The connecting seat is provided with a positioning pin that cooperates with the spindle limit of the machine tool; The connector is provided with an air inlet, which is the air intake channel.

2. The machine tool air jet cleaning device according to claim 1, characterized in that: The cross-sectional dimensions of the outer casing gradually decrease towards the air outlet.

3. The machine tool air jet cleaning device according to claim 2, characterized in that: There are multiple bladed disks, and the cross-sectional dimensions of the multiple bladed disks gradually decrease in the direction towards the air outlet.

4. The machine tool air jet cleaning device according to claim 1, characterized in that: The bladed disk comprises an integrally formed turntable and blades.

5. The machine tool air jet cleaning device according to claim 1, characterized in that: The air inlet is equipped with a mesh screen.

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